Quick answer: The train route comes after your group reaches the wider island. The Blue Tower, its prize requirement and the prepared key are the important checkpoints.

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Spoiler-light route
- Use the colored towers as your primary landmarks.
- Bring the required puzzle prizes to the Blue Tower progression point.
- Follow the key route carefully; an unfinished key will not open its destination.
Team roles
- Keep one person responsible for the key or progression item.
- Send a scout to identify the next landmark, then confirm the route over voice or text.
- Use the map once unlocked to name stations and avoid repeated wandering.
After trains unlock
- Learn the station sequence before splitting far apart.
- Use stations as planned rendezvous points.
- Return to skipped puzzle areas with a faster, clearer route.
Official sources
Release, platform, player-count, hosting and crossplay facts are checked against the official Big Walk FAQ and the official Steam page. Last checked August 27, 2026.